原文链接及内容
此示例演示了如何同时使用修改和选择交互。放大到感兴趣的区域并选择要编辑的要素，然后拖动点以修改要素。可以通过在编辑前选择多个要素来保留拓扑关系(按住Shift键并单击以选择多个要素)。
main.js代码如下：
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
| import GeoJSON from 'ol/format/GeoJSON.js';
import Map from 'ol/Map.js';
import VectorLayer from 'ol/layer/Vector.js';
import VectorSource from 'ol/source/Vector.js';
import View from 'ol/View.js';
import {
Modify,
Select,
defaults as defaultInteractions,
} from 'ol/interaction.js';
import {fromLonLat} from 'ol/proj.js';
const vector = new VectorLayer({
background: 'white',
source: new VectorSource({
url: 'https://openlayers.org/data/vector/us-states.json',
format: new GeoJSON(),
wrapX: false,
}),
});
const select = new Select({
wrapX: false,
});
const modify = new Modify({
features: select.getFeatures(),
});
const map = new Map({
interactions: defaultInteractions().extend([select, modify]),
layers: [vector],
target: 'map',
view: new View({
center: fromLonLat([-100, 38.5]),
zoom: 4,
}),
});
|
界面布局文件index.html代码如下：
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
| <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Modify Features</title>
<link rel="stylesheet" href="node_modules/ol/ol.css">
<style>
.map {
width: 100%;
height: 400px;
}
</style>
</head>
<body>
<div id="map" class="map"></div>
<script src="https://cdn.jsdelivr.net/npm/elm-pep@1.0.6/dist/elm-pep.js"></script>
<script type="module" src="main.js"></script>
</body>
</html>
|
)
